Solution: Level Network Adjustment
On the problem diagrams are instrument locations, blue numbers are sight distances, green are raw field elevations. Each network was run in the direction of the dashed brown line.
Adjust the non-turning points in each problem using the (1) Even distribution and (2) Proportional distribution. Compute to 0.001'.
Problem (1)
BM Nancy's elevation is 689.36'.
M = 689.41'-689.36' = +0.05'
(1) Equal Distribution
Number of elevations: n = 6
(2) Proportional distribution
Distance to points
A: 161'+158' = 319'
B: 319'+(235'+232')+(105'+107') = 998'
C: 998'+(201'+198')+(99'+101') = 1597'
BM Nancy: 1597'+(175'+173') = 1945'
Problem 2.
Benchmark elevations
BM BoBo | 1056.39 |
Bm McGee | 1081.94 |
The adjusted elevations are:
Point | A. Even | B. Proportional |
A | 1062.760' | 1062.761' |
B | 1066.070' | 1066.068' |
C | 1076.240' | 1076.240 |
Computations are left to the reader.